First when I brought it home it would not hold a vacuum because it came from the factory missing the o ring. Took it back and the next one had the o ring and held pressure fine. Started using and the nipple kept popping off the bleeder value when pressurized. Turns out that the tip that came with the kit was solid and did not have a any space for the fluid to run through. After drilling it out, it seems to work ok. Too much trouble.

The fittings for the bleed nipples are of the worse quality ever. They let air in like its their job. Also the part that the brake fluid goes into lets air it cause it will not seal also. This tool ended up letting more air into the lines then there was to begin with.